Features: 1. Various control modes (multi-periods, yellow flashing, manual control) 2. Simulated intersection display for easier programming. 3. Simple wiring according to E,S,W and S 4. Various protection functions including electric leakage protection, lightning protection, output short-circuit protection, high current shock protection. 5. Authomatic green conflict detection. 6. Built-in central control system to ensure work stability 7. Modular design-easy for maintenance and function extension.